In her chemistry class Carmen perform an experiment that involve a chemical reaction she measures the total mass of reactants she use it in her experiment using a triple beam balance the measurements she obtained its Illustrated below according to the law of division of masked where was the mass of products in her experiment

14,16 18 reacts with group

1 is the answer to this problem

the seeing the electronic configuration we can say that the element is fluorine.

fluorine is the most electronegative element in the periodic table.

but by only seeing the configuration we cannot say about its reactivity because we don't know if its configuration after excitation or by addition of electrons.

but if not then, it is the lightest halogen and exists as a highly toxic pale yellow diatomic gas at standard conditions. as the most electronegative element, it is extremely reactive: almost all other elements, including some noble gases, form compounds with fluorine.